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Minor Transmission Overhaul Kit
Fits 46-71 Jeep & Willys with T-90 Transmission

Part # T90BSG

Minor Transmission Overhaul Kit

Don't need everything? This minor overhaul kit may the way to go. Comes complete with all New bearings, seals, gaskets, snap rings, thrust washers, & roller bearings for your entire transmission.

T-90 Transmission

Synchronizer shift plates and springs are not sold in kit. They are available separately.

46-49 CJ-2A
49-53 CJ-3A
53-64 CJ-3B
55-71 CJ-5
50-52 M38
52-66 M38A1
46-64 Truck
46-64 Station Wagon

Part # Price





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I have a 1960 Jeep. The transmission appears to be okay but the shift handle is extremely sloppy. As a result it is hard to get it into gear. Any ideas what could be wrong.

Willys Jeep Parts Tech:
I would check your shift forks and you could have wear on the cane handle end as well.

Do you sell just a seal it for a T90 transmission and transfer case ?

Willys Jeep Parts Tech:
923300 and 923301

What's causing my 48 CJ2A to jump out of second gear when I lift off the throttle

Willys Jeep Parts Tech:
If you are lifting the handle i would check the end of your cane shaft for wear as well as your shift forks and brass synchronizes too.

Do you have a substitute/solution for the old leaded gas?

Willys Jeep Parts Tech:
Please email and we can try to help out.

Does kit t90bsg come with instructions

Willys Jeep Parts Tech:
It does not but if you do have any questions once you get the kit we can answer them for you at any time. Thanks

on your minor overhaul kit for the T90... How much more would the cost be for the sealed bearings instead of the ones listed.. Thanks

Willys Jeep Parts Tech:
We can include and discount. Please call us toll free. Happy to help out.

Are the front and rear bearings sealed?

Willys Jeep Parts Tech:
They were not originally but we now offer part numbers: 944559 & 943729

What is the difference between the t90 transmission with the 1-134 engine and the t90 transmission with a 225 V6 engine?

Willys Jeep Parts Tech:
Its a bit usually to have a T90 paired with the V6225 motor. Usually you see the T86AA with the V6225. If you do in fact have a very early CJ-5 with that T90 set up - really just the input shaft different between the two T90's..

The synchronizer shift plates and springs are shown in your photo for P/N T90BSG transmission overhaul kit. There is a note next to the photo stating these parts are not included. I read some of the Q&A's associated with this kit and one of the answers said all parts shown in the photo are included. That is confusing. Are the synchronizer shift plates and springs included in this kit. If so, it would be less confusing if the note was deleted.

Willys Jeep Parts Tech:
This is for front spindle only. They didn't use this on the D44.

I have a T90 column shift and I am looking for just the gasket for the top cover. Want to look inside before putting it back in service with a frame off restoration.

WIllys Jeep Parts Tech:
You will have to make some out of gasket sealant.

Are poppet springs and balls available?

Willys Jeep Parts Tech:
642769 and 453593 are the part numbers your after. Thanks!

On this t 90 kit, Item # T90BSG, will every thing be there as on the picture?

Willys Jeep Parts Tech:
Yes, the kit is as shown.

my 52 m38a1 makes a moderate whine/grind when driving that goes away when clutch is depressed I was told by a mechanic friend that it's probably the throw out bearing.... Is that a possibility? And does this minor kit have that?.... Thanks

Willys Tech:
Your throw out bearing is in your clutch part number: 635529

Hi, I purchased a 61 cj5 with 2nd gear snycros out or so I was told. I rebuilt the trans and it worked fine for a few days except it would kick out of 2nd when decelerating then lost 2nd gear again. Upon taking off the top cover I saw that the top set of gears had moved back and would not allow the gears to mesh. I purchased syncro set and a few more parts to make sure everything stayed in place. But when finished even though shifter locks into 2nd the trans just grinds. Any ideas, thanks

Willys Tech:
It could be your 2nd speed gear itself as well. I would check it for wear as well.

I have a 63' that keeps popping out of first gear when going down steep hills in 4 low also I'm having troubles locking in the hubs, any ideas?

Willys Tech:
It is probably your poppet balls and springs. I would check those for wear.

My cj2a is a bit of a frankinstine is there a way to tell if I have the t90 or t84 transmission in it

Willys Tech:
It will be stamped right on the drivers side of the case.

I'm intending to overhaul the T90a1 and T18 in my CJ-3B. Can you tell me who made your overhaul kits. Can you tell me who manufactured the main bearings or where they were made (China, Japan, USA?). thanks for your time.

Willys Tech:
We have them done by our professional rebuilder. The bearings are US made.

I have a 1960 Willys Jeep Truck w/a 6-226 flathead in it. I am looking to overhaul the transmission and transfer case and am wondering if any shims are required on either one and if so do they come in the minor overhaul kit. I believe all the gears and shafts are in good shape but both need new seals and the transmission is making what sounds like front bearing noise. Thanks. MB

Willys Tech:
The only place there really are shims is on the rear output of the transfercase. This is a great kit that will take care of most of your problems.

I am getting a Jeep with a T90 3 speed in it, but the high and low gears do not work only the reverse does. Do I need a complete rebuild or is it something simple?

Willys Tech:
Sounds like it is your syncronizer. I would start there. We have them part number: 640391

what are the part #'s for the synchronizer shift plates?

Willys Tech:
Part number: 640395

Does this kit come with the brass blocking rings and the FWD and Aft felt shaft seals?

Willys Tech:
This is less brass blocking rings but does come with seals.

Does this kit T90BSG (Minor overhaul kit)come with synchronizes?

Willys Tech:
No, it does not come with syncro parts. Try part numbers: 640394, 640395 & 640397. If you want the complete syncro it is part number: 640391
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